184 
Cyperus diandrus Torr. Cat. Pl. N. Y. 90 (1819). 
An unusually low and cespitose form, growing on the sandy banks of the rivers: 
Plummer Ford, August 22; Thedford, August 26 (No. 1718). 
Cyperus aristatus Rottb. Desc. & Icon. 23 (1773). 
Near a dried-up pond in the sand hills, Mullen, July 28 (No. 1599). 
Eleocharis palustris (L.) Rem. & Schult. Syst. Veg. 11, 151 (1817); Scirpus palustris 
L. Sp. Pl. i, 47 (1753). 
Approximately typical forms were collected at Dismal River, June 29; Plummer 
Ford, July 4; Cody’s Lakes, August 7 (No. 1485). A lower more slender form with 
more obovate achenes with a short tubercle: Thedford, June 14 to 20 (No. 1265). 
Eleocharis palustris glaucescens (Willd.) Gray, Man. ed. 5, 558 (1867); Scirpus 
glaucescens Willd. Enum. 76 (1809). 
Natick, June 19; Dismal River, June 27; Plummer Ford, July 3; Forks of Dismal 
River, July 11 (No, 1436), 
Eleocharis acicularis (L.) Ram. & Schult. Syst. Veg. ii, 154 (1817); Scirpus 
acicularis L. Sp. Pl. i, 47 (1753). 
In the specimens from Nebraska the spikes are lighter in color than usnal: Thed- 
ford, June 17 and 20; Dismal River, June 27; Plummer Ford, July 3; north of Whit- 
man, September 20 (No. 1337). 
Fimbristylis castanea (Mx.) Vahl. Enum. ii, 292 (1806); Scirpus castaneus Mx. F). 
i, 31 (1803). 
Perhaps this plant should have the name F. wmbellata from Schenus umbellatus 
Walt.,! but the identity is doubtful. Nebraska specimens are slender with heads of 
thin, bright-brown scales. In a meadow, near Thedford, August 19 (No. 1712). 
Scirpus americanus Pers. Syn. Pl. i, 68 (1805). 
Common in Nebraska: Thedford, June 15; Plummer Ford, July 4 (No. 1319). 
Scirpus lacustris L. Sp. Pl. i, 48 (1753). 
In Middle Loup River, Thedford, June 14 and 16 (No. 1276). 
Scirpus lacustris occidentalis Wats. Bot. Cal. ii, 218 (1880). 
This appears to be the first time this western plant has been collected east of the 
Rocky Mountains. In Middle Loup River, Thedford, June 21; Mullen, July 19 
(No. 1388). 
Scirpus atrovirens pallidus Britton, Trans. N. Y. Acad. ix, 14 (1889). 
Dismal River, June 27; Forks of Dismal River, July 11 (No. 1427). 
Scirpus fluviatilis (Torr.) Gray, Man. 527 (1848); Scirpus maritimus fluviatilis Torr. 
Aun. Lye. N. Y. iii, 324 (1836). 
Rare: in a dry lake northeast of Whitman, July 29 (No. 1612). 
Eriophorum gracile Koch; Roth, Cat. ii, 259 (1800). 
Collected in a swamp, near Dismal River, June 28 (No. 1446). 
Carex pseudo-cyperus L. Sp. Pl. ii, 978 (1753). 
This is perhaps the variety americana Hochst.2. Not previously collected in 
Nebraska. Swamp, 20 miles south of Whitman, August 4 (No. 1646). 
Carex hystricina Muhl.; Willd. Sp. Pl. iv, 282 (1805). 
Common: Thedford, June 14; Dismal River, June 27 (No. 1277). 
Carex trichocarpa aristata (R. Br.) Bailey, Bot. Gaz. x, 294 (1885); Carer aristata 
R. Br.; Richards. Bot. App. 751 (1823). 
A tall plant growing in swampy places: Forks of Middle Loup River, July 27; 20 
miles south of Whitman, August 4 (No. 1622). 
‘FI. Car, 70 (1788), * Herb. Unio Itin. (1837), 
